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  <title>Define the viewer's position with polar coordinates</title>

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</div><hr /><div id="function.swf-polarview" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">swf_polarview</h1>
  <p class="verinfo">(PHP 4)</p><p class="refpurpose"><span class="refname">swf_polarview</span> &mdash; <span class="dc-title">Define the viewer&#039;s position with polar coordinates</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.swf-polarview-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>swf_polarview</strong></span>
    ( <span class="methodparam"><span class="type">float</span> <code class="parameter">$dist</code></span>
   , <span class="methodparam"><span class="type">float</span> <code class="parameter">$azimuth</code></span>
   , <span class="methodparam"><span class="type">float</span> <code class="parameter">$incidence</code></span>
   , <span class="methodparam"><span class="type">float</span> <code class="parameter">$twist</code></span>
   )</div>

  <p class="para rdfs-comment">
   The <span class="function"><strong>swf_polarview()</strong></span> function defines the
   viewer&#039;s position in polar coordinates.  
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.swf-polarview-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">dist</code></em></dt>

     <dd>

      <p class="para">
       The distance between the viewpoint to the world space origin.  
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">azimuth</code></em></dt>

     <dd>

      <p class="para">
       Defines the azimuthal angle in the x,y coordinate plane, measured in
       distance from the y axis.  
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">incidence</code></em></dt>

     <dd>

      <p class="para">
       Defines the angle of incidence in the y,z plane, measured in distance
       from the z axis.  The incidence angle is defined as the angle of the
       viewport relative to the z axis.
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">twist</code></em></dt>

     <dd>

      <p class="para">
       Specifies the amount that the viewpoint is to be rotated about the
       line of sight using the right hand rule.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.swf-polarview-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>

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